Re: [PATCH 1/1] determine last ext3 LBA to fix wild LBA reads - v2
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: 2007-01-04 01:09:16
quoted hunk ↗ jump to hunk
static errcode_t linux_set_blksize (io_channel channel, int blksize) { + DEBUG_F("bs set to 0x%x\n", blksize); channel->block_size = bs = blksize; if (block_buffer) { free(block_buffer);@@ -600,6 +612,11 @@ static errcode_t linux_read_blk (io_channel channel, unsigned long block, int co tempb = (((unsigned long long) block) * ((unsigned long long)bs)) + (unsigned long long)doff; + if (tempb > dend) { + DEBUG_F("\nSeek error on block %lx, tempb=%Lx\n", block, tempb >> 9); + return EXT2_ET_LLSEEK_FAILED; + } +
In the case where we don't pass a "part", dend is 0 no ? We should check this case and not apply the test... Ben.